The Lowline — a planned subterranean park in an old Lower East Side trolley terminal — threw an Underground Garden Party on Tuesday.

The bash was at Lowline Lab, an Essex Street exhibit showing off the Lowline’s plans, including 3,000 plants.

Mostly naked performers in body paint frolicked among the flora.

Nix chef John Fraser created a menu that included troughs of raw veggies for guests like Megan Ellison, Gabrielle Hamilton, Sukey Novogratz, Alexandra Kerry and Julien Dobbs-Higginson to build their own salads.